Applicable Systems
OBD-II
Symptoms
System voltage is above the normal operating range. Control module or electrical components may be damaged.
Possible Causes
- Alternator voltage regulator failed
- Battery overcharged
- Wiring fault causing voltage spike
Troubleshooting Steps
- Step 1: Test alternator output voltage at battery terminals
Voltage above normal range - Step 2: Check voltage regulator operation
Regulator failed - Step 3: Inspect charging system wiring
Wiring intact
How to Reset
To reset: Clear the DTC after restoring system voltage to normal range.
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Source: SAE J2012 OBD-II Diagnostic Trouble Codes, SAE International
Category: OBD-II
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